1VDE

PI-SCEI, A HOMING ENDONUCLEASE WITH PROTEIN SPLICING ACTIVITY


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.192 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of PI-SceI, a homing endonuclease with protein splicing activity.

Duan, X.Gimble, F.S.Quiocho, F.A.

(1997) Cell 89: 555-564


  • PubMed Abstract: 
  • PI-Scel is a bifunctional yeast protein that propagates its mobile gene by catalyzing protein splicing and site-specific DNA double-strand cleavage. Here, we report the 2.4 A crystal structure of the PI-Scel protein. The structure is composed of two ...

    PI-Scel is a bifunctional yeast protein that propagates its mobile gene by catalyzing protein splicing and site-specific DNA double-strand cleavage. Here, we report the 2.4 A crystal structure of the PI-Scel protein. The structure is composed of two separate domains (I and II) with novel folds and different functions. Domain I, which is elongated and formed largely from seven beta sheets, harbors the N and C termini residues and two His residues that are implicated in protein splicing. Domain II, which is compact and is primarily composed of two similar alpha/beta motifs related by local two-fold symmetry, contains the putative nuclease active site with a cluster of two acidic residues and one basic residue commonly found in restriction endonucleases. This report presents prototypic structures of domains with single endonuclease and protein splicing active sites.


    Related Citations: 
    • Homing of a DNA Endonuclease Gene by Meiotic Gene Conversion in Saccharomyces Cerevisiae
      Gimble, F.S.,Thorner, J.
      (1992) Nature 357: 301
    • Substrate Recognition and Induced DNA Distortion by the Pi-Scei Endonuclease, an Enzyme Generated by Protein Splicing
      Gimble, F.S.,Wang, J.
      (1996) J.Mol.Biol. 263: 163


    Organizational Affiliation

    Structural and Computational Biology and Molecular Biophysics Program, Baylor College of Medicine, Houston, Texas 77030, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PI-SCEI
A, B
454Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: VMA1 (CLS8, TFP1)
EC: 7.1.2.2
Find proteins for P17255 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P17255
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.192 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 59.750α = 90.00
b = 102.400β = 94.10
c = 87.100γ = 90.00
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORphasing
X-PLORrefinement
SCALEPACKdata scaling
DENZOdata reduction
MADSYSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-04-08
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance